Douglas' Onion
Allium douglasii
Taxonomy
- Division:
- Magnoliophyta | - Flowering plants
- Family:
- Amaryllidaceae
- Genus:
- Allium
- Species:
- Allium douglasii
Growth Characteristics
- Life Cycle:
- Perennial
- Growth Habit:
- Geophyte
- Height:
- 1-2 ft
- Light Requirements:
- Full Sun
- Drought Tolerance:
- High
- Bloom Months:
- apr, may
- Bloom Colors:
- Purple
Native Range
United States: Idaho, Oregon, Washington
Reported Fauna Sightings
Bees: Fuzzy-horned bumble bee (Bombus mixtus), Fuzzy-horned bumble bee (Bombus mixtus), Two-form bumble bee (Bombus bifarius), Two-form bumble bee (Bombus bifarius)
Soil Requirements
- Soil Type:
- well-drained sandy or rocky soil
- pH:
- 6.0 - 7.5 (slightly acidic to neutral)
- Drainage:
- excellent drainage required
- Moisture:
- dry to moderate
- Notes:
- native to open, rocky slopes and grasslands
Germination Information
Pre-treatment: Single-step cold-moist stratification for temperate woodland species. for 60–120 days
Source: OpenAI GPT-4o